Half to c



' J. UOURSER.

NAILING JACK.

Patented Mar. 1, 1898.

#T6@ U w w w QM QM INVENTUR f 7 mu TNEG 4 tendin into a slot 61 of theextension a UNITED STATES PATENT OFFICE.

JAMES COURSER, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO O.F. ALLEN, OF SAME PLACE.

NAlLlNG-JAC K.

SPECIFICATION forming part of Letters Patent No. 599,994, dated March 1,189 8.

Application filed January 9,1896. Serial No. 574,864. (No model.)

T0 on whom, it may concern:

Be it known that I, JAMES COURSER, of Haverhill, in the county of Essexand State of Massachusetts, have invented certain new and usefulImprovements in Nailing-Jacks, of which the following is aspecification.

This invention relates to a new and useful improvement in nailing-jacks;and it consists in the novel features of construction and relativearrangement of parts hereinafter fully described in the specification,clearly illustrated in the drawings, and particularly pointed out in theclaims.

Reference is to be had to the accompanying one sheet ofdrawings, forminga part of this application, in which like characters indicate like partswherever they occur. Figure 1 represents in side elevation anailing-jack constructed in accordance with my invention. Fig; 2represents a section on the line 2 2 of Fig. 1.

a represents a member formed at its lower end with an opening a, adaptedto fit 0n the corresponding part of a standard, (not shown,) by whichthe member a and the parts carried thereby are supported, the member abeing free to turn on the standard.

The member a is provided with two integral extensions a a, forming agroove a, in which the last-support r is arranged.

4' represents a pin on the last-support, ex-

A dowel-pin r is shown in the drawings as connected to the last-supportby means of a balland-socket joint. The upward curvature of the bottomof the groove 0H and of the under side of the last-support or slide 0"fitting therein, adapts the latter to be readily displaced by endwisepressure during the manipulation of the jack and shoe to change theangle of inclination of said slide.

portion adapted to fit the convex portion of the standard so as topermit a back-and-forth movement of the last-support upon the standardand allow the same'to be readily displaced by endwise pressure, and astop for limiting the endwise movement of the last-support.

2. A nailing-jack comprising in its construction a fixed member orstandard having the upward extensions a a forming the groove (0 a slideor last-support frictionally held in said groove and adapted to haveaback-andforth movement on the fixed member, the said slide having aconcave under surface fitting the corresponding convex bottom of thesaid groove, so as to adapt the slide to be readily displaced by endwisepressure, the pin 0" operating in the slot a, and a spindle attached tothe slide or last-support by means of a ball-and-socket joint.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 1st day of January, A. D.1896.

JAMES OOURSER.

Witnesses:

ALFRED O. FULLER, ROBERT D. TRASK.

